Evidence for obliquity forcing of glacial termination II

Drysdale, R.N., Hellstrom, J.C., Zanchetta, G., Fallick, A.E., Sanchez Goni, M.F., Couchoud, I., McDonald, J., Maas, R., Lohmann, G. and Isola, I. (2009) Evidence for obliquity forcing of glacial termination II. Science, 325(5947), pp. 1527-1531. (doi: 10.1126/science.1170371)

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Publisher's URL: http://dx.doi.org/10.1126/science.1170371

Abstract

Variations in the intensity of high-latitude Northern Hemisphere summer insolation, driven largely by precession of the equinoxes, are widely thought to control the timing of Late Pleistocene glacial terminations. However, recently it has been suggested that changes in Earth's obliquity may be a more important mechanism. We present a new speleothem-based North Atlantic marine chronology which shows that the penultimate glacial termination (Termination II) commenced 141,000 ± 2,500 years before present, too early to be explained by Northern Hemisphere summer insolation but consistent with changes in Earth's obliquity. Our record reveals that Terminations I and II are separated by three obliquity cycles and that they started at near-identical obliquity phases.

Item Type:Articles
Additional Information:Originally published in Science Express on 13 August 2009
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Fallick, Professor Anthony
Authors: Drysdale, R.N., Hellstrom, J.C., Zanchetta, G., Fallick, A.E., Sanchez Goni, M.F., Couchoud, I., McDonald, J., Maas, R., Lohmann, G., and Isola, I.
Subjects:Q Science > QE Geology
College/School:College of Science and Engineering > Scottish Universities Environmental Research Centre
Journal Name:Science
Publisher:American Association for the Advancement of Science
ISSN:0036-8075
ISSN (Online):1095-9203

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